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-rw-r--r--lib/irb.rb1
1 files changed, 1 insertions, 0 deletions
diff --git a/lib/irb.rb b/lib/irb.rb
index 676abe42cd..ca36acd569 100644
--- a/lib/irb.rb
+++ b/lib/irb.rb
@@ -708,6 +708,7 @@ end
class Binding
# :nodoc:
+ undef irb if method_defined?(:irb)
def irb
IRB.setup(eval("__FILE__"))
IRB::Irb.new(IRB::WorkSpace.new(self)).run(IRB.conf)